I too have a rather large collection of knives. The ones I cherish the most that do not get used for anything are the knives that are hand made. I have a real affinity for Damascus style blades.
The knife in the 1st photo is made by a Lady in Twin falls Idaho. The handle is elk antler. The blade is made from an old file.
The knives in the following photos are a couple of Damascus blades I had made.
The knife with the deer horn antler was made by a fellow in Twin falls Idaho.
The other knife was made in Moose Pass Alaska by Virgil Cambell, the handle is made from petrified walrus tusk, the blade was folded approximately 25 times.